Roll device for spinning machines



Feb. 20, 1923.

R. C. RAHM ROLL DEVICE FOR SPINNING MACHINES Filed Nov. 12, 1921 Patented Feb. 20, i923.

, NiTEDSe-TES titans PATENT ,oFricE.

' ROBERT CARL BAHM, 0F WYOMISSING, PENNSYLVANIA.

noLI. nnvronron SPINNING MACHINES.

Application. filed November 12, 1921. Serial No. 514,481.

1' '0 all whom it may concern:

Be it known that I, Ronnnr CARL RAHM, a citizen of the United States, residing at iVyomissing, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Roll Devices for Spinning Machines, of which the following is a specification.

My invention relates to roll-feed devices adapted more particularly for thread doubling and twisting machines, the main ob jects being to provide for automatically spacing and evenly tensioning threads or strands passed thereover to receving mechanism. The invention is fully described in connection with the accompanying drawing illustrating a preferred embodiment thereof, and is clearly defined in the subjoined claims.

Fig. l is an end view of a mounted pair of feed rolls ordinary drive gear and a supporting Standard therefor being indicated.

Fig. 2 is a corresponding plan view of my improved device.

Fig. 3 indicates a simple modification of the roller arrangement.

It is customary in the class of machines referred to, to pass threadslor strands from supply spindles to winding means over in termediate feed rolls, and as my invention relates exclusively to an improved arrangement of rolls adapted to such use, the associated parts of known mechanism in connection with which it is usable is sufliciently indicated by the showing of a supporting,

standard 5 for the rolls and a drive shaft 6 and gear 7 for the latter.

The main function of such a roll device is the feeding of the threads delivered thereto, with a minimum of friction and with uniform tensioning tending to avoid breakage;

and my invention aims to accomplish this in a simple and effective manner.

To this end I utilize in a novel way the well known climbing tendency of a belt or cord running on an inclined pulley surface. Each of the two rolls 10, 10 as shown, is provided as heretofore with a pin ion, 11 or 11 and with axles or trunnions '12, 12 mounted in a frame 13 suitably carried by the standard 5, said pinion being arranged in mesh with said drive gear 7 the threads from determined spindles being passed as a single strand, and in a series of, convolutions as desired, around the two pulembodying my invention; an

leys :and thence to the twisting as indicated.

In my improved construction illustrated, all the axle bearings are arranged in the same plane, but are so spaced as to mount the shafts convergingly. Also, each of the rolls is tapered, as indicated, with their mechanism,

larger-diameter ends located adjacent the converging ends of the axles and their smaller-diameter ends adjacent the widerspreacl ends thereof. The increase in the diameter of the rolls at the axle-converged ends is preferably made suiiicient, as indicated, to neutralize the greater spread of the axles at the opposite end so as to make the convolutions of thread upon the two rolls equal at different points in the lengths of the rolls; that is, the sum of the two halfcircumferences of the rolls and of twice the spacing apart of the axles, is made equal at all points in the length of the rolls.

The effect of this combination of convergingly arranged axles and tapered rolls thereon, is to maintain a uniform spacingapart of any desired number of convolutions of the thread upon the two rolls, and a uniform tensioning of the thread. The spaced turns or convolutions of thread upon the rolls are made to be of equal length, a convolution received, through guide-eye 15, upon the take-on end of the rolls, remains at the same length as it travels towards thev let-01f end of the rolls, thus avoiding slackening or tightening; and the converging of the axles enables a determined automatic spacing apart of the convolutions to be secured withv a small taperingof the rolls, so that the slight slippage in'cident to such tapering is minimized. The described proportioning of the convergency of the axles and the tapering ofthe rolls insures most satisfactorily the avoidance of thread break age, but their proportions may be varied without seriously impairing the effect of my improved construction, and the roll taper which neutralizes the lengthening of the convolutions at the wide-spread axle por tions may be provided upon one of the rolls as indicated in Fig. 3 instead of being 10 equally divided upon the two rolls as in the preferred construction particularly described, which 'may be otherwise modified within the scope of my invention as defined in the claims.

What I claim is:

1. A roll-feed device comprising a pair of jointly driven equally tapered rolls mounted upon converging axles with their oppositely arranged larger-diameter ends closer spaced than their smaller-diameter ends.

2. A roll-feed device comprising a pair of jointly driven equally tapered rolls mounted upon converging axles, the taper of the rolls being arranged to neutralize the spread of the converging axles and equalize convolutio-ns of thread thereon.

A roll-feed device comprising jointly 

